Device for precisely controlling the lifting of the lower pressing mold plate and pressing equipment

Abstract

The utility model provides a device and pressing equipment for accurate control down -pressing closing mould plate lift, wherein the device includes lifting mechanism, position sensor, pressure sensor and controller, and lifting mechanism is used for driving down -pressing closing mould plate to lift, position sensor is used for detecting the position of down -pressing closing mould plate, pressure sensor is used for detecting the pressure of down -pressing closing mould plate, and controller is connected with lifting mechanism, pressure sensor and position sensor respectively, when down -pressing closing mould plate rises to carry out closing mould with upper pressing closing mould plate under the drive of lifting mechanism, controller is used to control lifting mechanism according to the information detected by position sensor and pressure sensor to control the closing mould position of down -pressing closing mould plate. The utility model can accurately adjust the closing mould position of down -pressing closing mould plate according to the product of different thickness to be pressed, makes the compression of the upper sealing ring of upper pressing closing mould plate consistent, and then the indentation depth produced to the product of different thickness to be pressed is consistent.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board pressing technology, and in particular to a device and pressing equipment for precisely controlling the lifting and lowering of a pressing template. Background Technology

[0002] In existing technology, the pressing equipment used in the roll-to-roll FPC (flexible printed circuit board) pressing operation includes an upper pressing template, a lower pressing template, and a lifting cylinder. The upper pressing template is located above the lower pressing template, and the lifting cylinder is located below the lower pressing template. The up and down movement of the lower pressing template is driven by the cylinder. However, during the process of driving the cylinder, it is impossible to accurately control the specific rising or falling position of the lower pressing template, and it is also impossible to accurately control the degree of compression of the sealing ring between the two after the lower pressing template and the lower pressing template are closed. As a result, it is impossible to control the uniformity of the indentation depth of products with different board thicknesses. This leads to the scrapping of thicker products due to excessive compression of the sealing ring, resulting in localized large indentation depths. Utility Model Content

[0003] To solve the above-mentioned technical problems, one embodiment of this utility model provides a device for precisely controlling the lifting and lowering of a pressing template, comprising: A lifting mechanism is used to drive the lower pressing template to move up and down; A position sensor is used to detect the position of the lower pressing template; A pressure sensor is used to detect the pressure applied to the lower pressing template; The controller is connected to the lifting mechanism, the pressure sensor, and the position sensor respectively. When the lower pressing mold rises under the drive of the lifting mechanism to close with the upper pressing mold, the controller is used to control the lifting mechanism based on the information detected by the position sensor and the pressure sensor to control the closing position of the lower pressing mold.

[0004] Optionally, the lifting mechanism includes a hydraulic cylinder connected to a servo valve, which is connected to a controller. The controller is used to control the hydraulic cylinder via the servo valve.

[0005] Optionally, the device further includes a base and a pressure bearing plate, the lifting mechanism is mounted on the base, and the lifting mechanism is drivenly connected to the pressure bearing plate through the pressure sensor; the lower pressing template is relatively fixed on the pressure bearing plate; the position sensor is disposed between the base and the pressure bearing plate.

[0006] Optionally, the position sensor includes a position detection unit and a position processing unit. One end of the position detection unit is fixedly connected to the pressure bearing plate, and the other end of the position detection unit is fixedly connected to the position processing unit. The position processing unit is fixed on the base and connected to the controller.

[0007] Optionally, the pressure sensor includes an upper pressure block, a pressure detection unit, and a lower pressure block. The pressure detection unit is disposed between the upper pressure block and the lower pressure block, and the pressure detection unit is connected to the controller. The upper pressure block is fixedly connected to the pressure-bearing plate, and the lower pressure block is fixedly connected to the output end of the lifting mechanism.

[0008] Optionally, after the upper and lower pressing templates are closed and a vacuum is drawn, and before the vacuum bladder inside the upper pressing template is inflated, the lower pressing template is lowered under the drive of the lifting mechanism, so that a clearance space is formed between the lower pressing template and the upper pressing template for the product to be pressed to extend outward during pressing.

[0009] Optionally, the vertical spacing of the clearance space is greater than the thickness of the product to be pressed.

[0010] Optionally, the lower surface edge of the upper pressing template is provided with an upper sealing ring. In its natural state, the upper sealing ring protrudes from the lower surface of the upper pressing template. When the mold is closed, the upper sealing ring compresses the same amount of material on products of different thicknesses.

[0011] Another embodiment of the present invention provides a pressing device, including a frame, an upper pressing template, a lower pressing template, and the above-mentioned device, wherein the upper pressing template is fixed on the frame and is located above the lower pressing template.

[0012] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects: This invention allows for precise adjustment of the mold closing position of the lower pressing template based on products of different thicknesses, ensuring consistent compression of the upper sealing ring on the upper pressing template, thereby maintaining consistent indentation depth for products of different thicknesses. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a pressing device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the upper pressing template provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a pressing template provided in an embodiment of the present invention; Figure 4 This is a cross-sectional view of a pressing device provided in an embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms "above" and "over," and any variations thereof, are intended to describe positional relationships and do not imply direct contact between the described objects.

[0017] A pressing mold used for pressing products, i.e., flexible circuit boards to be pressed, includes an upper pressing mold and a lower pressing mold. The lower pressing mold is located below the upper pressing mold and can rise under the drive of a lifting mechanism to close the mold with the lower pressing mold. Since a vacuum needs to be drawn into the mold cavity formed after the upper and lower pressing molds are closed before pressing, the mold cavity after the upper and lower pressing molds are closed is a sealed space. In this technical field, an upper sealing ring is generally provided on the lower surface edge of the upper pressing mold. In its natural state, the upper sealing ring protrudes from the lower surface of the upper pressing mold. During mold closing, the lower pressing mold rises under the drive of the lifting mechanism to compress the upper sealing ring, thereby sealing the mold cavity. In existing technology, the mold closing position of the lower pressing mold is fixed. Therefore, the degree of compression on the upper sealing ring varies for products of different thicknesses. For relatively thicker products, the upper sealing ring is compressed more during mold closing, meaning the compression amount of the upper sealing ring is larger. For relatively thinner products, the upper sealing ring is compressed less during mold closing, meaning the compression amount of the upper sealing ring is smaller. As a result, the indentation depth produced during mold closing is inconsistent for products of different thicknesses. This leads to thicker products being scrapped due to excessive compression of the upper sealing ring, resulting in localized large indentation depths.

[0018] To solve the above technical problems, please refer to Figures 1 to 4 This utility model provides a device for precisely controlling the lifting and lowering of a lower pressing mold 11, including a lifting mechanism 2, a position sensor 15, a pressure sensor 14, and a controller. The lifting mechanism 2 drives the lower pressing mold 11 to lift and lower. The position sensor 15 detects the position of the lower pressing mold 11, and the pressure sensor 14 detects the pressure on the lower pressing mold 11. The controller is connected to the lifting mechanism 2, the pressure sensor 14, and the position sensor 15. When the lower pressing mold 11 rises under the drive of the lifting mechanism 2 to close with the upper pressing mold 9, the controller controls the lifting mechanism 2 based on the information detected by the position sensor 15 and the pressure sensor 14 to control the closing position of the lower pressing mold 11.

[0019] This embodiment can precisely adjust the closing position of the lower pressing template according to the different thicknesses of the products to be pressed, so that the compression amount of the upper sealing ring of the upper pressing template is consistent, thereby making the indentation depth of the products to be pressed consistent for different thicknesses.

[0020] This embodiment achieves precise control of the compression degree of the upper sealing ring by employing a "displacement-pressure" dual-parameter closed-loop control logic: Displacement reference setting: The target upward displacement value of the lower pressing template 11 is preset according to the different thicknesses of the products to be pressed. This value corresponds to the optimal pre-compression amount of the upper sealing ring 904 (e.g., 0.1-0.3mm). The position sensor 15 detects the stroke of the lifting mechanism 2 in real time (since the lower pressing template 11 is relatively fixed at the output end of the lifting mechanism 2, the stroke of the lifting mechanism 2 is also the stroke of the lower pressing template 11), and transmits the displacement data back to the controller in real time to form a position closed-loop control, ensuring that the upward distance of the lower pressing template 11 is accurate to ±0.01mm.

[0021] Pressure feedback correction: When the lower pressing template 11 rises to the point where it begins to contact the upper sealing ring 904, the pressure sensor 14 (with an accuracy of ±0.5% FS) detects the pressure change of the lower pressing template 11 in real time. The controller compares the real-time pressure signal with the preset pressure threshold curve. When a pressure surge point is detected (the characteristic point where the upper sealing ring 904 begins to produce elastic deformation), the displacement control parameters are automatically corrected.

[0022] Dual-parameter cross-control logic: The controller has a built-in compression degree algorithm model, which cross-verifies the displacement data and pressure signal. When the displacement reaches the preset value but the pressure does not reach the threshold, it is determined that the upper sealing ring 904 is aging and the upward stroke is automatically fine-tuned. When the pressure exceeds the limit but the displacement does not meet the standard, it is determined that a foreign object has intervened and the protection program is immediately triggered.

[0023] By dynamically controlling both displacement and pressure, the actual extrusion amount of the upper sealing ring 904 is ultimately controlled within the preset range.

[0024] This control method avoids the overpressure problem that may be caused by wear of the upper sealing ring if displacement control is relied upon alone, and solves the defect that pressure control alone cannot accurately position the product, thus achieving consistency in the degree of compression of the upper sealing ring when the mold is closed for products of different thicknesses.

[0025] This utility model does not limit the specific type of the lifting mechanism 2, such as a hydraulic lifting mechanism, a pneumatic lifting mechanism, or an electric lifting mechanism.

[0026] As one embodiment, the lifting mechanism 2 includes a lifting electric cylinder, which is connected to a servo motor. The servo motor is connected to a controller, which controls the lifting electric cylinder through the servo motor.

[0027] In the second embodiment, the lifting mechanism 2 includes a hydraulic cylinder connected to a servo valve, which in turn is connected to a controller. The controller is used to control the hydraulic cylinder via the servo valve. Both the hydraulic cylinder and the servo valve are components of a hydraulic system, and hydraulic systems are a mature technology in the mechanical field; therefore, this embodiment will not elaborate further on them.

[0028] In this embodiment, the controller can be a PLC or an integrated controller, which integrates multiple functional modules such as processor, memory, input and output. This embodiment does not impose specific limitations on this.

[0029] The device for precisely controlling the lifting and lowering of the pressing template provided in this embodiment also includes a base 1 and a pressure bearing plate 4. The lifting mechanism 2 is installed on the base 1 and is drivenly connected to the pressure bearing plate 4 through the pressure sensor 14. The pressing template 11 is relatively fixed on the pressure bearing plate 4. The position sensor 15 is disposed between the base 1 and the pressure bearing plate 4.

[0030] In this embodiment, the base 1 and the lifting mechanism 2 can be an integrated structure or two independent structures; this embodiment does not impose any restrictions on this.

[0031] As one specific embodiment, please refer to Figure 4 The base 1 and the lifting mechanism 2 are integrated into one structure. Taking the lifting mechanism 2, which includes a hydraulic cylinder, as an example, the hydraulic cylinder includes a cylinder barrel, a cylinder head 201, a piston 202, and a piston rod 203. The base 1 has a receiving groove 101 in the middle. Therefore, the base 1 can serve as the cylinder barrel of the hydraulic cylinder. The cylinder head 201 is sealed and fixed on the receiving groove 101. The piston 202 is located in the receiving groove 101. One end of the piston rod 203 is fixedly connected to the piston 202. The other end of the piston rod 203 (i.e., the output end of the lifting mechanism 2) passes through the cylinder head 201 and is connected to the pressure sensor 14. The piston rod 203 and the cylinder head 201 are dynamically sealed.

[0032] The position sensor 15 can be a contact structure or a non-contact structure; this embodiment does not impose specific limitations on either. The position sensor 15 can be a displacement sensor, such as a grating displacement sensor, a magnetostrictive displacement sensor, or a laser displacement sensor, or it can be a position encoder.

[0033] Taking the position sensor 15 as a contact structure as an example, the position sensor 15 includes a position detection unit and a position processing unit. One end of the position detection unit is fixedly connected to the pressure bearing plate 4, and the other end of the position detection unit is fixedly connected to the position processing unit. The position processing unit is fixed on the base 1 and is connected to the controller.

[0034] In this embodiment, the position detection unit is a retractable structure, such as a sensor line, and the position processing unit is a receiver. When the lifting mechanism 2 moves up and down, it synchronously drives the position detection unit to extend and retract. At this time, the distance signal of the extended and retracted position detection unit is received by the position processing unit, and then transmitted to the controller. The controller converts this signal into position data for fine-tuning, thereby achieving position distance control.

[0035] This embodiment does not limit the specific type of pressure sensor 14, such as piezoresistive, capacitive, piezoelectric, resonant, inductive, etc.

[0036] In one specific embodiment, the pressure sensor 14 includes an upper pressure block, a pressure detection unit, and a lower pressure block. The pressure detection unit is disposed between the upper pressure block and the lower pressure block, and is connected to the controller. The upper pressure block is fixedly connected to the pressure-bearing plate 4, and the lower pressure block is fixedly connected to the output end of the lifting mechanism 2.

[0037] This embodiment does not limit the specific type of pressure detection unit, such as a pressure-sensitive element.

[0038] In this embodiment, after the upper pressing template 9 and the lower pressing template 11 are closed and a vacuum is drawn, and before the vacuum bladder 903 inside the upper pressing template 9 is inflated, the lower pressing template 11 is lowered under the drive of the lifting mechanism 2. This creates a clearance space between the lower pressing template 11 and the upper pressing template 9, allowing the product to extend outwards during pressing. Without this clearance space, the upper pressing template 9 and the lower pressing template 11 would be in a tightly closed state. If the vacuum bladder 903 of the upper pressing template 9 inflates and crushes the product, the crushed product would not be able to extend outwards in time, resulting in wrinkles and defects that would render it unusable. In this embodiment, opening the mold to a certain height before inflating the vacuum bladder 903 ensures that the product can extend outwards synchronously after being crushed by the vacuum bladder 903, preventing the accumulation of wrinkles.

[0039] In this embodiment, the vertical spacing of the clearance space is greater than the thickness of the product to be pressed.

[0040] Another embodiment of the present invention provides a vacuum pressing device, including a frame, an upper pressing template 9, a lower pressing template 11, and the aforementioned device for precisely controlling the lifting and lowering of the lower pressing template 11. The upper pressing template 9 is fixed on the frame and located above the lower pressing template 11.

[0041] The frame includes a first side plate 5 and a second side plate 10 spaced apart, and a top plate 6 is fixedly installed at the top of the first side plate 5 and the second side plate 10. Below the top plate 6, the upper pressing template 9 is fixedly installed between the first side plate 5 and the second side plate 10, and the upper surface of the upper pressing template 9 is provided with an upper heat insulation plate 7 and an upper heating plate 8 from top to bottom.

[0042] The lower pressing template 11 is located below the upper pressing template 9 and is fixed to the pressure bearing plate 4. The pressure bearing plate 4 is movably disposed between the first side plate 5 and the second side plate 10. The pressure bearing plate 4 can be raised and lowered by the lifting mechanism 2 below it, and the pressure bearing plate 4 synchronously drives the lower pressing template 11 to be raised and lowered.

[0043] The lower surface of the lower pressing template 11 is provided with a lower heating plate 12 and a lower heat insulation plate 13 from top to bottom.

[0044] The bottom ends of the first side plate 5 and the second side plate 10 are fixed with a base 1. The lifting mechanism 2 is installed on the base 1. The output end of the lifting mechanism 2 is connected to the pressure bearing plate 4 through a pressure sensor 14. The position sensor 15 is disposed between the base 1 and the pressure bearing plate 4.

[0045] On both sides of the lifting mechanism 2, there are also several lifting guide columns 3 between the base 1 and the pressure bearing plate 4. The purpose is to provide sufficient vertical support force to support the lower pressing template 11 and prevent the lower pressing template 11 from separating from the upper pressing template 9 during the inflation of the vacuum bag 903 after the mold is closed.

[0046] The upper pressing template 9 includes a rubber plate fixing plate 901, an airbag fixing plate 902, a vacuum airbag 903, and an upper sealing ring 904. The vacuum airbag 903 is fixed to the lower surface of the rubber plate fixing plate 901 by the airbag fixing plate 902, that is, the airbag fixing plate 902 is fixed to the lower surface of the rubber plate fixing plate 901, and the vacuum airbag 903 is fixed to the lower surface of the airbag fixing plate 902. The upper sealing ring 904 is located at the edge of the lower surface of the rubber plate fixing plate 901 and protrudes from the lower surface of the rubber plate fixing plate 901.

[0047] The area of ​​the rubber plate fixing plate 901 is larger than the area of ​​the airbag fixing plate 902, and the lower surface of the rubber plate fixing plate 901 is provided with a receiving and mounting groove for accommodating and installing a vacuum airbag 903 and an airbag fixing plate 902 of matching dimensions.

[0048] The lower surface of the rubber plate fixing plate 901 is provided with a closed groove around its outer periphery, and the upper sealing ring 904 is embedded in the groove and protrudes from the groove.

[0049] The rubber plate fixing plate 901 is provided with a first inflation hole, and the airbag fixing plate 902 is provided with a second inflation hole that communicates with the first inflation hole. The second inflation hole communicates with the vacuum airbag 903, and the vacuum airbag 903 is inflated and deflated through the first inflation hole and the second inflation hole.

[0050] The lower pressing template 11 includes a lower heating plate 1104, a heat-applied iron plate 1101, a lower sealing ring 1103, and several pads 1102. The lower heating plate 1104 has a recess in the center of its upper surface. The lower sealing ring 1103 is located below the heat-applied iron plate 1101, and the heat-applied iron plate 1101 is sealed in the recess by the lower sealing ring 1103. The upper surface of the heat-applied iron plate 1101 is flush with the upper surface of the lower heating plate 1104. Because the heat-applied iron plate 1101 is located in the recess of the lower heating plate 1104, the area of ​​the lower heating plate 1104 is larger than the area of ​​the heat-applied iron plate 1101, and the area of ​​the heat-applied iron plate 1101 is larger than the area of ​​the vacuum bag 903. The several pads 1102 are distributed on the circumferential surface of the upper surface of the lower heating plate 1104. The lower heating plate 1104 is provided with a first air guide channel, and the burning iron plate 1101 is provided with a second air guide channel that communicates with the first air guide channel. The mold cavity formed after the upper pressing template 9 and the lower pressing template 11 are closed is vacuumed and the vacuum is broken through the first air guide channel and the second air guide channel.

[0051] In this embodiment, the purpose of vacuuming the mold cavity formed after mold closing is to remove the air inside the product to be pressed, so as to prevent air bubbles from existing in the pressed product.

[0052] In this embodiment, the pad 1102 is used to raise the internal space of the mold cavity after the upper pressing template 9 and the lower pressing template 11 are closed, so that there is a certain gap between the two templates to ensure that the upper sealing ring 904 of the upper pressing template 9 contacts and limits the upper surface of the lower pressing template 11, and ensures that the plane of the product's surrounding surfaces is appropriately and tightly attached.

[0053] In the above scheme, by setting a vacuum bladder 903 in the structure of the upper pressing template 9, the upper pressing template 9 can apply pressure to the flexible circuit board on the upper surface of the burnt iron plate 1101 of the lower pressing template 11 in a soft landing manner during the pressing process, so as to avoid deformation or poor indentation of the flexible circuit board at both ends of the pressing template during the pressing process; and several pads 1102 are set on the surface of the lower pressing template 11, which are raised by superimposing, further reducing the squeezing force of the upper sealing ring 904 on the surface of the upper pressing template 9 on the flexible circuit board.

[0054] In addition, the bottom of the burnt iron plate 1101 in the lower pressing mold 11 is designed with a lower sealing ring 1103, which can achieve the sealing effect around the burnt iron plate 1101 after the upper pressing mold 9 and the lower pressing mold 11 are closed. This ensures that the vacuum degree in the mold cavity after the upper and lower pressing molds 11 are closed after the vacuuming action meets the standard and there is no problem of air pressure leakage. Furthermore, the area of ​​the lower heating plate 1104 in the lower pressing mold 11 is larger than the area of ​​the burnt iron plate 1101, which avoids the problem of the four edges of the vacuum bladder 903 being squeezed into the gap between the burnt iron plate 1101 and the lower heating plate 1104 during the pressing operation, causing the air bladder to rupture. This further increases the safety of the pressing operation.

[0055] The third embodiment of this utility model also provides a vacuum pressing process, which uses the above-mentioned vacuum pressing equipment. The process includes: Driven by the lifting mechanism 2, the lower pressing template 11 rises to the first suitable position and closes with the upper pressing template 9; The cavity formed after the lower pressing template 11 and the upper pressing template 9 are closed is evacuated. After vacuuming is completed, the lifting mechanism 2 descends and drives the lower pressing template 11 to a second suitable position, so that a clearance space is formed between the lower pressing template 11 and the upper pressing template 9 for the product to be pressed to extend outward when it is pressed. Inflate and pressurize the vacuum bladder 903 inside the upper pressing template 9, and use the inflated pressure to press the product to be pressed. After the pressing is completed, the vacuum bag 903 is deflated, and the lower pressing template 11 is lowered to the initial position by the lifting mechanism 2.

[0056] In this embodiment, the lower pressing template 11 rises to a first suitable position under the drive of the lifting mechanism 2, and closes with the upper pressing template 9, including: The target upward displacement value of the lower pressing template 11 is preset according to the thickness of the product. The position sensor 15 detects the stroke of the lower pressing template 11 in real time and transmits the displacement data back to the controller in real time. The controller sets the target pressure of the pressure sensor 14. When the actual pressure detected by the pressure sensor 14 matches the target pressure, the controller automatically corrects the upward displacement of the lower pressing mold plate 11 to control the lifting mechanism 2, causing the lower pressing mold plate 11 to rise to a first suitable position. The first suitable position is the mold closing position mentioned above.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for precision control of the lifting of the lower pressing mold plate, characterized in that, include: A lifting mechanism is used to drive the lower pressing template to move up and down; A position sensor is used to detect the position of the lower pressing template; A pressure sensor is used to detect the pressure applied to the lower pressing template; The controller is connected to the lifting mechanism, the pressure sensor, and the position sensor respectively. When the lower pressing mold rises under the drive of the lifting mechanism to close with the upper pressing mold, the controller is used to control the lifting mechanism based on the information detected by the position sensor and the pressure sensor to control the closing position of the lower pressing mold.

2. The apparatus of claim 1, wherein, The lifting mechanism includes a hydraulic cylinder, which is connected to a servo valve. The servo valve is connected to a controller, which controls the hydraulic cylinder through the servo valve.

3. The apparatus of claim 1, wherein, It also includes a base and a pressure bearing plate. The lifting mechanism is mounted on the base and is driven by the pressure sensor to the pressure bearing plate. The lower pressing template is fixed to the pressure bearing plate. The position sensor is disposed between the base and the pressure bearing plate.

4. The apparatus of claim 3, wherein, The position sensor includes a position detection unit and a position processing unit. One end of the position detection unit is fixedly connected to the pressure bearing plate, and the other end of the position detection unit is fixedly connected to the position processing unit. The position processing unit is fixed on the base and is connected to the controller.

5. The apparatus of claim 3, wherein, The pressure sensor includes an upper pressure block, a pressure detection unit, and a lower pressure block. The pressure detection unit is disposed between the upper pressure block and the lower pressure block and is connected to the controller. The upper pressure block is fixedly connected to the pressure-bearing plate, and the lower pressure block is fixedly connected to the output end of the lifting mechanism.

6. The apparatus of claim 1, wherein, After the upper and lower pressing templates are closed and a vacuum is drawn, and before the vacuum bladder inside the upper pressing template is inflated, the lower pressing template is lowered under the drive of the lifting mechanism, so that a clearance space is formed between the lower pressing template and the upper pressing template for the product to be pressed to extend outward during pressing.

7. The apparatus of claim 6, wherein, The vertical spacing of the clearance space is greater than the thickness of the product to be pressed.

8. The apparatus of claim 1, wherein, The lower surface edge of the upper pressing template is provided with an upper sealing ring. In its natural state, the upper sealing ring protrudes from the lower surface of the upper pressing template. When the mold is closed, the upper sealing ring compresses the same amount of material on products of different thicknesses.

9. A press apparatus characterized by comprising: It includes a frame, an upper pressing template, a lower pressing template, and the device according to any one of claims 1 to 8, wherein the upper pressing template is fixed on the frame and located above the lower pressing template.

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